I coin new description of classical architecture (5)
I believe the answer is:
ionic
'description of classical architecture' is the definition.
'ionic' can be an answer for 'architecture' (I've seen this before). I'm unsure of the 'description of classical' bit.
'i coin new' is the wordplay.
'new' is an anagram indicator.
'coin' with letters rearranged gives 'onic'.
'i'+'onic'='IONIC'
Can you help me to learn more?
(Other definitions for ionic that I've seen before include "Classic order of architecture" , "Like a type of column with scrolled capitals" , "Greek order" , "Support (a weight)" , "A type of classical Greek column" .)